RUT ACE JE. 517 



cells 4-oo , 2-seriate descendent ; micropyle extrorse superior. Fruit 

 coriaceous, usually outwardly scarcely fleshy ; cocci 2-5, dry or sub- 

 drupaceous {Euguaiacum), dorsally obtuse (Larrea), carinate or 

 more or less wide-winged {Euguaiacum), sometimes dorsally mem- 

 branous (Bulnesia), glabrous, or more rarely villous {Larrea), 

 finally separating from axis, indeliiscent {Larrea), septiciclal 

 {Eugiiaiaciim, Pintoa), or inwardly dehiscing {Porlieria, Bulnesia). 

 Seeds usually solitary in cocci ; testa thin ; embiyo axile (often 

 green); cotyledons more or less elongated.; albumen fleshy, or more 

 or less hard or corneous, outwardly smooth or slightly rimose 

 {Euguaiacum). — Resinous or balsamic trees or shrubs, some spartioid 

 {Bulnesia) ; wood often hard ; branches nodose articulate ; leaves 

 opposite stipulate, pinnate, 2-*) -foliolate ; folioles entire (sometimes 

 sensitive) unsymmetrical at base ; flowers 1 solitary or cymose few, 

 pedunculate lateral to leaves (Trop. and Subtrop. Temp, and Mont. 

 America"). 



122? Plectrocarpa Gill. 3 — "Flowers often irregular; sepals 5, 

 concave, imbricated. Petals 5, spathulate, unguiculate, slightly 

 longer than calyx, open in aestivation. Stamens 10 ; filaments 

 filiform or subulate, free at base or enlarged on both sides by sub- 

 ulate squamules and scales fleshy fimbriate-lacerate stipate ; anthers 

 oblong, introrsely rimose. Gerinen sessile densely villous, ovoid- 

 5-agonal, 5-locular ; style subulate stigmatiferous at apex ; ovules in 

 each cell 2, descending, laterally inserted by funicle at middle of 

 cell. Fruit villous subulate-5-agonal or rather terete; cocci 5, 

 indeliiscent, middle of back produced in subulate spur. Seed solitary 

 in cells, descending compressed ; albumen thin fleshy ; embryo 

 axile; cotyledons ovate foliaceous. — A ramified shrub; branches 

 terete spiuose at nodes ; spines strong straight, 4-partite ; leaves 

 fasciculate at nodes, imparipinnate ; folioles oblong sericeous 

 4, 5-jugate ; flowers 4 solitary, pedunculate, erect between fascicles of 

 leaves" (Mendoza 5 ). 



1 Yellow, purple, or bluish, often large, i. 151 (Bulnesia), 153 (Pintoa); iii. 840; iv. 

 handsome. 406; 481, 482 (Porlieria). 



2 Spec, ad 18. Lindl., in Bot. Reg. (1839), 8 In Hook. Bot. Misc., iii. 166.— Endl., 

 t. 9.— C. Gay, loo. cit., 471 (Larrea), 476 Gen., n. 6010.— B. H., Gen., 268, n. 15. 

 (Porlieria).— A. Gray, PI. Wright., 28 (Por- 4 " Dense villosis." 



lieria).— H. Bn., in Adansonia, x. 315 (Por- 5 Spec. 1. P. telracanlha Gill., loc. cit.— 



lieria).— Walp., Rep., v. 386 (Larrea); Ann., Walp., Rep., i. 498. 



